Home / 30,886.40-42,623.32-18,137.12

Finding the Fourth Proportional to 30,886.40, 42,623.32 and 18,137.12

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Solution

The fourth proportional to 30,886.40, 42,623.32 and 18,137.12 is: 25,029.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,886.40 : 42,623.32 = 18,137.12 : x
  2. Step 2: Convert to fraction form
    30,886.40/42,623.32 = 18,137.12/x
  3. Step 3: Cross multiply
    30,886.40x = 42,623.32 × 18,137.12
  4. Step 4: Simplify right side
    30,886.40x = 773,064,269.64
  5. Step 5: Solve for x
    x = 773,064,269.64/30,886.40
  6. Step 6: Final answer
    x = 25,029.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.